Proxima Fusion closes €411M Series C led by Google, RWE at €2.4B valuation
Munich-based Proxima Fusion raised €411 million ($468 million) in a funding round led by XTX Ventures and East X Ventures, with Google and German utility RWE as strategic investors. The round brings Proxima's valuation to €2.4 billion ($2.7 billion), establishing it as Europe's best-funded fusion company. Other investors include KfW Capital, SPRIND, Burda Principal Investments, and returning backers Plural, UVC Partners, Balderton, and Cherry Ventures.
The funding will accelerate development of Alpha, Proxima's net-energy stellarator demonstrator scheduled for the early 2030s near Munich. RWE has committed to partnering with Proxima on building the first commercial stellarator fusion power plant on a decommissioned nuclear fission site in Gundremmingen, Bavaria. Combined with a prior €400 million from the Bavarian government, Proxima has now secured €800 million toward Alpha, with a further €1.2 billion expected from a German federal grant expected to be tendered later in 2026.
Google's investment marks its first backing of a European fusion company, signaling tech sector confidence in fusion as long-term carbon-free energy. Proxima has raised over €650 million total in less than three years, including €95 million in public grants—a public-private model that demonstrates how targeted government co-investment catalyzes venture capital at scale.
Sources
- Primary source
- sifted.eu
“Munich-headquartered Proxima Fusion has raised €411m at a €2.5bn valuation in a round led by XTX Ventures and East X Ventures. Other investors include Google, German energy company RWE.”
- bloomberg.com
“German startup Proxima Fusion has raised €411 million ($469 million) from a range of investors, including national energy firm RWE AG and Alphabet Inc.'s Google, to develop a nuclear fusion plant it hopes will be operational in the 2030s.”
- techfundingnews.com
“The funding round comes after Proxima received €400 million from the state of Bavaria in February 2026. The new investment exceeds the private capital required by that agreement, highlighting the success of the public-private funding model.”